Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected to the fixing portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, a driving assembly, a rechargeable battery for providing an electrical energy required for the motor, a coil, and a wireless charging circuit for receiving an electric power of the coil for charging the rechargeable battery. The driving assembly includes a motor including and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly and for driving the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. The coil receives an external charging power and is disposed on the fixing portion, the moving portion, or the linkage assembly.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected to the fixing portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, a driving assembly, a rechargeable battery for providing an electrical energy required for the motor, a coil, and a wireless charging circuit for receiving an electric power of the coil for charging the rechargeable battery. The driving assembly includes a motor including and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly and for driving the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. The coil receives an external charging power and is disposed on the fixing portion, the moving portion, or the linkage assembly.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected to the fixing portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, a driving assembly, a rechargeable battery for providing an electrical energy required for the motor, a coil, and a wireless charging circuit for receiving an electric power of the coil for charging the rechargeable battery. The driving assembly includes a motor including and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly and for driving the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. The coil receives an external charging power and is disposed on the fixing portion, the moving portion, or the linkage assembly.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected to the fixing portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, a driving assembly, a rechargeable battery for providing an electrical energy required for the motor, a coil, and a wireless charging circuit for receiving an electric power of the coil for charging the rechargeable battery. The driving assembly includes a motor including and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly and for driving the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. The coil receives an external charging power and is disposed on the fixing portion, the moving portion, or the linkage assembly.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected to the fixing portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, a driving assembly, a rechargeable battery for providing an electrical energy required for the motor, a coil, and a wireless charging circuit for receiving an electric power of the coil for charging the rechargeable battery. The driving assembly includes a motor including and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly and for driving the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. The coil receives an external charging power and is disposed on the fixing portion, the moving portion, or the linkage assembly.

Abstract: An electronic rear derailleur of the disclosure includes a movable portion including a main drive gear meshing with a first driven gear and a second driven gear, a support frame disposed on the movable portion and for the main drive gear, the first driven gear, and the second driven gear to perform positioning, a drive unit configured to drive, by using a transmission assembly, the main drive gear to rotate, and a positioning system including: a main board, a processing unit and a position sensor disposed on the main board, and a positioning shaft including a magnetic field generation unit facing the position sensor, and receiving, by using the processing unit, positioning information sent by the position sensor. The position sensor is configured to detect a change in an angular position to correct a parameter, thereby restoring a speed change function for normal speed change positioning.

Abstract: A rear derailleur of a bicycle includes a fixing portion having a first pivot portion and a second pivot portion, a linkage assembly including a first connecting shaft and a second connecting shaft, a moving portion, a chain guide assembly connected to the moving portion, and a driving assembly. An end of the first connecting shaft is pivotally connected to the first pivot portion via a first pivot. An end of the second connecting shaft is pivotally connected to the second pivot portion via a second pivot. The moving portion has a third pivot portion pivotally connected to the first connecting shaft via a third pivot and a fourth pivot portion pivotally connected to the second connecting shaft via a fourth pivot. The driving assembly is disposed on either the first connecting shaft or the second connecting shaft and drives one of the first to fourth pivots to drive the linkage assembly to pivot.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected between the fixing portion and the moving portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, and a driving assembly including a clutch assembly, a motor, and a driving gear assembly connected to the clutch assembly. The clutch assembly is disposed between the fixing portion and the linkage assembly and includes a first clutch member and a second clutch member. When a relative rotational torque between the first clutch member and the second clutch member is greater than a predetermined resistance, the first clutch teeth and the second clutch teeth shift relatively. Thereby, the driving gear assembly or the output shaft of the motor could be prevented from damaging.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly, a moving portion, a chain guide assembly, and a driving assembly. The linkage assembly is pivotally connected to the fixing portion. The moving portion is pivotally connected to the linkage assembly. The chain guide assembly is connected to the moving portion. The driving assembly includes a motor and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly. The output shaft of the motor drives the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. A pivot shaft and a detachable battery module are disposed on the moving portion. The chain guide assembly is pivotally connected to the pivot shaft. The battery module provides an electric power to the motor.

Abstract: An electronic rear derailleur of the disclosure includes a movable portion including a main drive gear meshing with a first driven gear and a second driven gear, a support frame disposed on the movable portion and for the main drive gear, the first driven gear, and the second driven gear to perform positioning, a drive unit configured to drive, by using a transmission assembly, the main drive gear to rotate, and a positioning system including: a main board, a processing unit and a position sensor disposed on the main board, and a positioning shaft including a magnetic field generation unit facing the position sensor, and receiving, by using the processing unit, positioning information sent by the position sensor. The position sensor is configured to detect a change in an angular position to correct a parameter, thereby restoring a speed change function for normal speed change positioning.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected between the fixing portion and the moving portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, and a driving assembly including a clutch assembly, a motor, and a driving gear assembly connected to the clutch assembly. The clutch assembly is disposed between the fixing portion and the linkage assembly and includes a first clutch member and a second clutch member. When a relative rotational torque between the first clutch member and the second clutch member is greater than a predetermined resistance, the first clutch teeth and the second clutch teeth shift relatively. Thereby, the driving gear assembly or the output shaft of the motor could be prevented from damaging.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly, a moving portion, a chain guide assembly, and a driving assembly. The linkage assembly is pivotally connected to the fixing portion. The moving portion is pivotally connected to the linkage assembly. The chain guide assembly is connected to the moving portion. The driving assembly includes a motor and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly. The output shaft of the motor drives the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. A pivot shaft and a detachable battery module are disposed on the moving portion. The chain guide assembly is pivotally connected to the pivot shaft. The battery module provides an electric power to the motor.

Abstract: A rear derailleur of a bicycle includes a fixing portion having a first pivot portion and a second pivot portion, a linkage assembly including a first connecting shaft and a second connecting shaft, a moving portion, a chain guide assembly connected to the moving portion, and a driving assembly. An end of the first connecting shaft is pivotally connected to the first pivot portion via a first pivot. An end of the second connecting shaft is pivotally connected to the second pivot portion via a second pivot. The moving portion has a third pivot portion pivotally connected to the first connecting shaft via a third pivot and a fourth pivot portion pivotally connected to the second connecting shaft via a fourth pivot. The driving assembly is disposed on either the first connecting shaft or the second connecting shaft and drives one of the first to fourth pivots to drive the linkage assembly to pivot.

Abstract: A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly pivotally connected to the fixing portion, a moving portion pivotally connected to the linkage assembly, a chain guide assembly connected to the moving portion, a driving assembly, a rechargeable battery for providing an electrical energy required for the motor, a coil, and a wireless charging circuit for receiving an electric power of the coil for charging the rechargeable battery. The driving assembly includes a motor including and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly and for driving the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. The coil receives an external charging power and is disposed on the fixing portion, the moving portion, or the linkage assembly.

Abstract: A method of operating an electronic transmission is disclosed, including the following steps. First, turn on the electronic transmission, initialize settings, and perform as an operating mode. Next, detect whether a setup command, a shifting command, or a shutdown command is received. If the setup command is received, perform as the setup mode; if the shifting command is received, perform shifting; if the shutdown command is received, shut down the electronic transmission. If none of the commands is received for a predetermined period, detect whether a standby function is executed. If the function is not executed, shut down the electronic transmission; if the function is executed, perform as a standby mode, and detect whether to receive any command in a less energy consumption manner. If any command is received, return to perform as the operating mode whereby the method protects, including sustaining the power supply.

Abstract: An electronic rear derailleur includes a driving unit, a gearbox, a base portion, and a derailleur portion. The gearbox includes a biasing member, a first power gear, a second power gear, a first passive gear, and a second passive gear. The first power gear connects with the driving unit. Force is transmitted from the first power gear to the second power gear through the biasing member. The second power gear meshes the first passive gear and the second passive gear. The first passive gear and the second passive gear are respectively used to allow relative rotation between the gearbox and the derailleur portion with respect to the base portion, whereby the chain of a bicycle can be moved to engage with different sprockets to achieve the purpose of shifting.

Abstract: An electronic shifting device and a bicycle using the same are provided. The electronic shifting device includes a primary controller, a first electronic derailleur unit, a second electronic derailleur unit, a cable, a main power supply and a first control unit. The first electronic derailleur unit is disposed adjacent to a first sprocket set, and the second electronic derailleur unit is disposed adjacent to a second sprocket set. The first electronic derailleur unit and the second electronic derailleur unit are configured to move a chain between a plurality of sprockets. The cable electrically connects the primary controller, the first electronic derailleur unit and the second electronic derailleur unit. The main power supply provides electrical power to the primary controller, the first electronic derailleur unit and the second electronic derailleur unit by the cable. The first control unit is configured for wirelessly transmitting a first control signal to the primary controller.

Abstract: An electronic rear derailleur includes a driving unit, a gearbox, a base portion, and a derailleur portion. The gearbox includes a biasing member, a first power gear, a second power gear, a first passive gear, and a second passive gear. The first power gear connects with the driving unit. Force is transmitted from the first power gear to the second power gear through the biasing member. The second power gear meshes the first passive gear and the second passive gear. The first passive gear and the second passive gear are respectively used to allow relative rotation between the gearbox and the derailleur portion with respect to the base portion, whereby the chain of a bicycle can be moved to engage with different sprockets to achieve the purpose of shifting.

Abstract: A method of operating an electronic transmission is disclosed, including the following steps. First, turn on the electronic transmission, initialize settings, and perform as an operating mode. Next, detect whether a setup command, a shifting command, or a shutdown command is received. If the setup command is received, perform as the setup mode; if the shifting command is received, perform shifting; if the shutdown command is received, shut down the electronic transmission. If none of the commands is received for a predetermined period, detect whether a standby function is executed. If the function is not executed, shut down the electronic transmission; if the function is executed, perform as a standby mode, and detect whether to receive any command in a less energy consumption manner. If any command is received, return to perform as the operating mode whereby the method protects, including sustaining the power supply.

Abstract: An electric front derailleur, comprising: a support member, disposed on a frame of a bicycle and having a first mounting portion and a second mounting portion; a driving unit, disposed in the first mounting portion and configured to drive a worm gear to rotate; a first transmission unit, having at least one transmission gear that is driven by the worm gear; a second transmission unit, comprising a rack, a linking member, and a swing member, wherein the rack is engaged with the transmission gear and movably disposed in the second mounting portion, and the linking member has one end pivoted to the rack and the other end pivoted to the swing member; a chain guide, comprising a pivot portion, and a chain guiding portion, wherein the pivot portion are pivoted to the swing member, and the chain guiding portion is configured to move a chain.